US7913812B2 - Composite sound barrier panel - Google Patents
Composite sound barrier panel Download PDFInfo
- Publication number
- US7913812B2 US7913812B2 US11/842,718 US84271807A US7913812B2 US 7913812 B2 US7913812 B2 US 7913812B2 US 84271807 A US84271807 A US 84271807A US 7913812 B2 US7913812 B2 US 7913812B2
- Authority
- US
- United States
- Prior art keywords
- noise attenuation
- layer
- attenuation layer
- noise
- sound barrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 230000004888 barrier function Effects 0.000 title claims abstract description 15
- 239000004567 concrete Substances 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000002023 wood Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000011152 fibreglass Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- -1 stucco Substances 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 206010022998 Irritability Diseases 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 201000006549 dyspepsia Diseases 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000010370 hearing loss Effects 0.000 description 1
- 231100000888 hearing loss Toxicity 0.000 description 1
- 208000016354 hearing loss disease Diseases 0.000 description 1
- 208000024798 heartburn Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000397 ulcer Toxicity 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0076—Cellular, e.g. as wall facing
- E01F8/0082—Cellular, e.g. as wall facing with damping material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8457—Solid slabs or blocks
- E04B2001/8461—Solid slabs or blocks layered
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31971—Of carbohydrate
- Y10T428/31989—Of wood
Definitions
- the present invention relates to sound barriers, such as sound-absorbing walls.
- Highway noise can greatly impact quality of life for the nearby residents.
- the federal Environmental Protection Agency has determined that noise levels above 66 decibels are unsafe for residential areas, while 72 dB is the limit for commercial environments. It has been suggested that high decibel levels along the highways may be linked to hearing loss, high blood pressure, irritability, ulcers, and heartburn, among other ailments.
- a standard pickup truck at 50 mph produces noise at 70 dB, while a medium truck is twice as loud at 80 dB.
- a motorcycle can reach 90 dB, which is four times louder than the pickup truck.
- Highway noise is not only a function of the inherent noisiness of each vehicle. For instance, highway noise doubles when the traffic increases from 200 vehicles per hour to 2000 vehicles per hour, or when traffic speed increases from 30 mph to 65 mph. A single semi-trailer truck at 55 mph produces as much noise as ten cars at the same speed. It is not hard to see that highway noise in densely populated urban environments can quickly become unbearable.
- Some noise abatement systems involve designing the roads themselves to reduce vehicle noise. Lower highway speed limits within city limits can reduce noise. For new development, buffer zones are provided between the residential or commercial buildings and the highway. But for many older neighborhoods, traffic volume has steadily increased over the years as the traffic flow on the adjacent roads has increased. For these neighborhoods, sound barriers are the most viable solution.
- Effective noise abatement systems can reduce sound levels 10-15 dB, cutting the loudness of the traffic in half.
- earth barriers are relative inexpensive and can be used to improve the ecological aesthetics of the neighborhood. This approach is common for new neighborhoods but not often available for existing residential areas. Walls, on the other hand, take up less space. Generally, such walls are limited to 25 feet in height for structural and aesthetic reasons. Noise walls may be built from wood, stucco, concrete, masonry, metal and similar materials.
- Concrete sound barrier walls are frequently used because they require only minimal continuing upkeep and are very weather resistant. Moreover, the ability to produce pre-fabricated concrete panels can simplify construction, while also providing the ability to add aesthetic features to the panels.
- FIG. 1 is a perspective view of a composite sound barrier panel according to one embodiment of the present invention.
- FIG. 2 is an end view of the composite panel shown in FIG. 1 .
- FIG. 3 is a sound transmission loss graph for an exemplary composite panel fabricated according to the present invention.
- a composite sound barrier panel 10 includes a substrate 12 and a noise attenuation layer 20 , as shown in FIGS. 1 and 2 .
- the substrate 12 is preferably a pre-formed or pre-molded concrete panel.
- the substrate may include reinforcing members 14 throughout the panel, such as rebar or wire mesh.
- the substrate 12 may incorporate various known elements for lifting the panel 10 , for interconnecting panels or for supporting the panel at the job site, all as dictated by the particular needs. For instance, lifting bolt threaded inserts may be provided at the top edge 16 of the substrate 12 for engagement with lifting cables.
- the lateral edges 17 may be formed as lap joints or in some other interlocking configuration to integrate with an adjacent panel. Alternatively, connector plates may be embedded in the lateral edges 17 . It is contemplated that the substrate 12 can be formed according to the design of the particular noise abatement system.
- the noise attenuation layer 20 is formed from a combination of concrete with a fiber composite filler.
- the fiber composite filler is preferably fiberglass, and most preferably waste fiberglass.
- waste fiberglass recycles a hazardous waste material.
- the use of waste fiberglass significantly reduces the cost of the panel 10 since the cost of the waste material from a reclamation company is significantly lower than the cost of a pre-manufactured fiberglass panel.
- the noise attenuation layer 20 is formed from 21 ⁇ 2 parts fiber composite material, 1 part cement and 1 ⁇ 2 part water.
- the cement is preferably Lehigh Type 1 or equivalent.
- the fiber composite material, or fiberglass, is shredded so that it can be mixed with the cement and water. These constituents are thoroughly mixed and poured into a mold corresponding to the desired shape of the panel.
- the mold face may incorporate structural and/or design features as dictated by the design of the noise abatement system. It is contemplated in a most preferred embodiment that the noise attenuation layer 20 is not a load bearing component of the panel, so reinforcement elements are not essential.
- a thin layer of cement may be initially poured, followed immediately by the noise attenuation layer. This thin layer will hide any fiber composite that may reside at the surface of noise attenuation layer. Pouring the noise attenuation layer immediately after the initial concrete layer will allow the two layers to merge together.
- the concrete substrate 12 may be poured. Pouring this substrate layer while the reduction layer is fresh will allow the materials to commingle and firmly bond together once the concrete has set.
- the pour for the substrate can proceed according to known concrete panel fabrication techniques, especially where reinforcement elements 14 or other structural/functional elements are to be incorporated into the substrate.
- the substrate may have a higher slump than the noise attenuation layer to maintain the integrity of the two parts of the panel 10 .
- the panels 10 have a height and length that is determined by the needs at the job site.
- the thickness of the substrate 12 will preferably range from 4-6 inches, with a most preferred thickness of 41 ⁇ 2 inches.
- the thickness of the noise attenuation layer 20 can be sized according to the desired noise attenuation characteristics of the layer. This thickness will typically range from 2-5 inches.
- a panel was fabricated with a 51 ⁇ 4 inch thick substrate and a 3 inch thick noise attenuation.
- the sound transmission loss curve for this specimen is shown in FIG. 3 .
- the transmission loss values correspond to the reduction in sound decibels from one side of the panel to the other.
- This specimen produced an STC of 46 and an OITC of 41.
- the latter number is generally accepted to be more appropriate with respect to road noise because it is based on transmission loss values down to 80 Hz, rather than the 125 Hz weighting of the STC number.
- an OITC number of 41 means that loud speech and music from an adjacent room can be easily heard.
- TC numbers above 40 are very well suited for road noise attenuation barriers. It can be noted from the graph in FIG.
- the panels of the present invention will reduce the transmitted noise by at least 35 dB, to about 45 dB which is about as loud as an air conditioning unit.
- the concrete substrate 12 may be modified as desired for particular considerations, such as strength, cost, weather resistance, aesthetics and the like.
- additives may be combined with the cement used to form the concrete substrate, such as plasticizers, sealants and pigments.
- plasticizers, sealants and pigments Some variation in the materials of the noise attenuation layer 20 may be acceptable, although significant modifications may compromise the sound transmission loss performance of the panel. It is therefore preferred that any materials added the noise attenuation layer have sufficient sound absorption qualities.
- wood chips are added to the fiberglass and cement.
- the wood chips are 1 ⁇ 4-11 ⁇ 2 inches in length and no more than about 1 ⁇ 4 inches thick.
- the wood chips are most preferably recycled from wood products that have been comminuted.
- the wood chips are combined in the concrete mixture according to the following formula: 2 parts wood chips, 1 part fiberglass, 1 part cement and 1 ⁇ 2 part water.
- the concrete mixture is prepared according to known techniques to form the noise attenuation layer 20 . Since the layer 20 is not intended for load bearing, the volume ratio of additives to cement can be much higher than other concrete additives, hence the ability to incorporate not only fiberglass but also woodchips in the concrete mixture. In this circumstance, the cement operates as a binder between the additives as well as between the noise abatement layer 20 and the load bearing concrete substrate 12 .
- One aspect of the panel 10 of the present invention is that it can be easily precast at a manufacturing facility remote from the installation site.
- a number of identical molds may be used to produce a quantity of uniform panels, or a single mold may be used to produce a length of panel that is cut to size.
- the precast panels may formed in fixed molds, by slip-forming, or by other known techniques for fabricating pre-cast concrete panels.
- the concrete substrate 12 is poured onto the noise abatement layer 20 so that the two layers commingle or physically bond.
- each segment of the composite panel may be separately formed and cured, and then chemically bonded with a suitable adhesive material, such as concrete adhesive, epoxy and mortar.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/842,718 US7913812B2 (en) | 2007-08-21 | 2007-08-21 | Composite sound barrier panel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/842,718 US7913812B2 (en) | 2007-08-21 | 2007-08-21 | Composite sound barrier panel |
Publications (2)
Publication Number | Publication Date |
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US20090050401A1 US20090050401A1 (en) | 2009-02-26 |
US7913812B2 true US7913812B2 (en) | 2011-03-29 |
Family
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US11/842,718 Expired - Fee Related US7913812B2 (en) | 2007-08-21 | 2007-08-21 | Composite sound barrier panel |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120180414A1 (en) * | 2011-01-18 | 2012-07-19 | Mull-It-Over Products | Interior wall cap for use with an exterior wall of a building structure |
WO2012178144A2 (en) * | 2011-06-23 | 2012-12-27 | Gregory Smith | Sound barriers made from scrap and waste materials |
WO2013076601A1 (en) | 2011-11-22 | 2013-05-30 | Wuertzen Jakob | Method of recycling fiberglass and/or carbon fibers for thermal insulation and/or sound insulation, use of particles for thermal cavity wall insulation, and a sound barrier panel |
US8544218B2 (en) * | 2008-03-27 | 2013-10-01 | Dell Seven, Inc. | Acoustically insulating product |
US20160265216A1 (en) * | 2013-10-31 | 2016-09-15 | Construction Research & Technology Gmbh | Concrete element comprising a sound-absorber |
US9650748B2 (en) | 2014-01-21 | 2017-05-16 | H. Fredrick Peterson | Sound attenuating structure |
US20170221468A1 (en) * | 2016-02-02 | 2017-08-03 | Nut Shell LLC | Systems and methods for constructing noise reducing surfaces |
US10352043B2 (en) * | 2015-04-23 | 2019-07-16 | Hughes General Contractors, Inc. | Joint-free concrete |
US11620974B2 (en) | 2017-03-15 | 2023-04-04 | Chinook Acoustics, Inc. | Systems and methods for acoustic absorption |
US12118972B2 (en) | 2020-10-30 | 2024-10-15 | Chinook Acoustics, Inc. | Systems and methods for manufacturing acoustic panels |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1033926C2 (en) | 2007-06-03 | 2008-12-08 | Maasland Nv | Method and device for managing a group of dairy animals, as well as a computer program product thereof. |
US20100224442A1 (en) * | 2009-03-09 | 2010-09-09 | Mark Sanders | Sound barrier panel |
NL2004345C2 (en) * | 2010-03-05 | 2011-09-09 | Hans Hill | Damping element. |
US10105869B2 (en) * | 2014-11-11 | 2018-10-23 | Peter Bigelow | Method of manufacturing a cement-mixed concrete tile |
CA3099362C (en) * | 2016-03-30 | 2023-01-24 | Giatec Scientific Inc. | Embedded wireless monitoring sensors |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3625808A (en) * | 1969-09-29 | 1971-12-07 | Martin Fireproofing Corp | Composite concrete and cement-wood fiber plank |
US4325457A (en) * | 1979-07-19 | 1982-04-20 | Durisol Materials Limited | Acoustical barrier |
US4513040A (en) * | 1983-04-22 | 1985-04-23 | Ribbon Technology, Inc. | Highly wear-resistant steel fiber reinforced concrete tiles |
US4607466A (en) * | 1984-05-29 | 1986-08-26 | Allred John C | Method and apparatus for controlling reverberation of sound in enclosed environments |
US5678363A (en) * | 1993-12-21 | 1997-10-21 | Ogorchock; Paul | Sound barrier panel |
US20030097806A1 (en) * | 1996-03-05 | 2003-05-29 | Brown John G. | Inner accessible commutering enterprise structure interfaced with one or more workplace, vehicle or home commutering stations |
US6827179B2 (en) * | 2002-03-25 | 2004-12-07 | Commonwealth Industries, Inc. | Sound barrier system |
US20060048997A1 (en) * | 2004-08-24 | 2006-03-09 | Matthew Foster | Acoustical and firewall barrier assembly |
US20060188740A1 (en) * | 2005-02-18 | 2006-08-24 | Yi-Che Kuan | Composite panel and method of making the same |
US20070137139A1 (en) * | 2005-12-21 | 2007-06-21 | Patrick Tierney | Performance enhancing underlayment, underlayment assembly, and method |
-
2007
- 2007-08-21 US US11/842,718 patent/US7913812B2/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3625808A (en) * | 1969-09-29 | 1971-12-07 | Martin Fireproofing Corp | Composite concrete and cement-wood fiber plank |
US4325457A (en) * | 1979-07-19 | 1982-04-20 | Durisol Materials Limited | Acoustical barrier |
US4513040A (en) * | 1983-04-22 | 1985-04-23 | Ribbon Technology, Inc. | Highly wear-resistant steel fiber reinforced concrete tiles |
US4607466A (en) * | 1984-05-29 | 1986-08-26 | Allred John C | Method and apparatus for controlling reverberation of sound in enclosed environments |
US5678363A (en) * | 1993-12-21 | 1997-10-21 | Ogorchock; Paul | Sound barrier panel |
US20030097806A1 (en) * | 1996-03-05 | 2003-05-29 | Brown John G. | Inner accessible commutering enterprise structure interfaced with one or more workplace, vehicle or home commutering stations |
US6827179B2 (en) * | 2002-03-25 | 2004-12-07 | Commonwealth Industries, Inc. | Sound barrier system |
US20060048997A1 (en) * | 2004-08-24 | 2006-03-09 | Matthew Foster | Acoustical and firewall barrier assembly |
US20060188740A1 (en) * | 2005-02-18 | 2006-08-24 | Yi-Che Kuan | Composite panel and method of making the same |
US20070137139A1 (en) * | 2005-12-21 | 2007-06-21 | Patrick Tierney | Performance enhancing underlayment, underlayment assembly, and method |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8544218B2 (en) * | 2008-03-27 | 2013-10-01 | Dell Seven, Inc. | Acoustically insulating product |
US8572914B2 (en) * | 2011-01-18 | 2013-11-05 | Mull-It-Over Products | Interior wall cap for use with an exterior wall of a building structure |
US20120180414A1 (en) * | 2011-01-18 | 2012-07-19 | Mull-It-Over Products | Interior wall cap for use with an exterior wall of a building structure |
WO2012178144A2 (en) * | 2011-06-23 | 2012-12-27 | Gregory Smith | Sound barriers made from scrap and waste materials |
WO2012178144A3 (en) * | 2011-06-23 | 2013-03-14 | Gregory Smith | Sound barriers made from scrap and waste materials |
US8684135B2 (en) * | 2011-06-23 | 2014-04-01 | Heritage Research Group | Sound barriers made from scrap and waste materials |
WO2013076601A1 (en) | 2011-11-22 | 2013-05-30 | Wuertzen Jakob | Method of recycling fiberglass and/or carbon fibers for thermal insulation and/or sound insulation, use of particles for thermal cavity wall insulation, and a sound barrier panel |
US10017938B2 (en) * | 2013-10-31 | 2018-07-10 | Construction Research & Technology, Gmbh | Concrete element comprising a sound-absorber |
US20160265216A1 (en) * | 2013-10-31 | 2016-09-15 | Construction Research & Technology Gmbh | Concrete element comprising a sound-absorber |
US9650748B2 (en) | 2014-01-21 | 2017-05-16 | H. Fredrick Peterson | Sound attenuating structure |
US10352043B2 (en) * | 2015-04-23 | 2019-07-16 | Hughes General Contractors, Inc. | Joint-free concrete |
US20170221468A1 (en) * | 2016-02-02 | 2017-08-03 | Nut Shell LLC | Systems and methods for constructing noise reducing surfaces |
US11551654B2 (en) * | 2016-02-02 | 2023-01-10 | Nut Shell LLC | Systems and methods for constructing noise reducing surfaces |
US11620974B2 (en) | 2017-03-15 | 2023-04-04 | Chinook Acoustics, Inc. | Systems and methods for acoustic absorption |
US12014713B2 (en) | 2017-03-15 | 2024-06-18 | Chinook Acoustics, Inc. | Systems and methods for acoustic absorption |
US12118972B2 (en) | 2020-10-30 | 2024-10-15 | Chinook Acoustics, Inc. | Systems and methods for manufacturing acoustic panels |
Also Published As
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US20090050401A1 (en) | 2009-02-26 |
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